/*
 * Copyright 2008-2009 the original author or authors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *
 */
package org.guzz.service;

import java.util.concurrent.Callable;

/**
 * 
 * 用于实际的读取耗时操作的数据。如从网络中查询服务获取数据。
 *
 * @author liukaixuan(liukaixuan@gmail.com)
 */
public interface FutureDataFetcher<T> extends Callable<T>{
		
	public T getDefaultData() ;

}
